I'm trying to use the AggregateImagePropertiesIsolation scheduler filter to isolate a specific image to a single host for licensing reasons, however it appears to always return all hosts instead of the one that should be valid. I've added the filter to the config, and restarted the scheduler:

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Is aggregate_image_properties_isolation_namespace set in your environment (not suggesting it needs to be but if it is then it impacts how the image property needs to be specified)? This would be in the Nova config.